How Much B12 Is In Fish?
How Much B12 Is In Fish? Fish and Shellfish This is how much B12 you’ll find in a 3-ounce serving of these foods: Cooked clams: 84.1 micrograms. Steamed mussels: 20.4 micrograms. Cooked Atlantic mackerel: 16.1 micrograms. How much B12 do you need per day? While the recommended daily amount of vitamin B-12 for adults is